The Anxiety Depression Distress Inventory-27 (ADDI-27): New Evidence of Factor Structure, Item-Level Measurement Invariance, and Validity.
Garcia AF, Berzins T, Acosta M, Pirani S, Osman A. The Anxiety Depression Distress Inventory-27 (ADDI-27): New Evidence of Factor Structure, Item-Level Measurement Invariance, and Validity. J Pers Assess. 2018 May-Jun; 100(3):321-332.